FEEDBACK SUPPRESSOR
Contents
1. Weight 3 Kg 6 8lbs CE The product is in compliance with Directive 89 336 EEC Electromagnetic Compatibility and following modifications 92 31 EEC and 93 68 EEC as the following standards EN 50082 1 1997 EN 55013 1990 EN 55020 1994 it is also in compliance with Directive 73 23 EEC Low Voltage and following modifications 93 68 EEC as the following standard EN 60065 1998 PROEL PROEL S p A World Headguarters Factory Via alla Ruenia 37 43 64027 Sant Omero Te Italy Tel 39 0861 811241 Fax 39 0861 887862 E mail info proelgroup com installation proelgroup com2. Grounding is useful for user safety Use only connectors and accessories suggested by the manufacturer This unit should be placed in a rack see INSTALLATION and kept far from gt Wet places gt Direct exposure to heat sources like sun light gt Non properly ventilated places Disconnect the power cord during storms or when the unit is not used A In order to prevent fire and electric shock risks it s necessary to keep the unit far from sprinkling and drops Please don t put cups vases or other object containing liquids over the unit In case of interferences from source signal THD value will raise over 10 Don t place this unit in a bookshelf o in other places with small room PROEL S P A is not responsible for any damage that occurs due to a wrong unit installation Thank you for choosing one of Proel products and for your confidence towards our brand synonymous of professionalism accuracy high quality and reliability All our products are CE approved and designed for continuous use in professional installation systems Description This unit has been specifically designed to eliminate feedback that may incur in a PA system FEATURES Advanced design and manufacturing accuracy Very easy installation Four independent NOTCH filters Frequency cut controls Frequency level LED indicator Filter bypass master switch 24V DC emergency power Front panel description POWER switch and LED Freguency level LED i
3. USER S MANUAL FEEDBACK SUPPRESSOR AF4 PROEL DD 1 IMPORTANT SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK j DO NOT OPEN CAUTION To reduce the risk of electric shock do not remove cover or back panel No user serviceable parts inside Refer servicing to qualified personnel only WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture This symbol is intended to alert the user of the presence of uninsulated dangerous voltage within the product enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons A This symbol is intended to alert the user of the presence of important operating and maintenance servicing instruction in the literature accompanying the appliance Please carefully read the owner s manual INSTRUCTIONS All safety and operating instructions should be read before the product is operated Retain these instructions All safety and operating instructions should be retained for future reference This owner s manual should be considered as a part of the product and it must accompany it every time and delivered to the new user when this product is sold In this way the new owner will be aware of all the installations operating and safety instructions Heed all warnings All warnings on the product and in owner s manual should be adhered to Heed all warnings Follow all instructions All operating
4. and user s instructions must be followed UI Sentences preceded by A symbol contain important safety instruction Please read it carefully DETAILED SAFETY INSTRUCTIONS Water and moisture This apparatus should not be used near water i e bathtub kitchen sink swimming pools etc Ventilation This apparatus should be placed in position that doesn t interfere with correct ventilation This unit for example should not be placed on a bed sofa cover o similar surfaces that could cover ventilation openings or placed in a built in installation such a bookcase or a cabinet that could block air flow trough ventilation openings Heat This apparatus should be placed away from heat sources like radiators heat registers stoves or other products including amplifiers that produce heat Power sources This apparatus should be connected only to power source type specified in this owner s manual or on the unit e If the supplied AC power cable plug is different from wall socket please contact an electrician to change the AC power plug Grounding or Polarization e All precautions must be observed in order to avoid grounding or polarization defeating e Unit metal parts are grounded through the AC power cord If the AC power outlet doesn t have grounding consult an electrician for outlet grounding Power cord protection The power cord should be routed in a way it will not be walked on or pinched by items placed upon or agains
5. n order to choose the desired frequency 60Hz 6KHz use FREQ knob in conjunction with its multiplication switch x1 x10 You can set each frequency attenuation using the DEPTH knob UI 6 Filter bypass master switch In case you desire to deactivate or to control unit filters operation it s possible to simultaneously deactivate all the filters pressing the switch fig 1 ref 3 to its OUT position To make filters active again press again the switch IN Operations a Toturn on the unit press the POWER switch ON its led is lit b Toturn offthe unit press the POWER switch OFF its led too will be off as well c In order to do an accurate frequency setting please use the unit front panel freguency level LED indicator d To activate de activate all NOTCH filters use the IN OUT switch fig 1 ref 3 e In order to modify attenuation frequency please use FREQ knob and x1 x10 switch the choose the attenuation use DEPTH knob fig 1 ref 4 A Warning In order to avoid forthcoming units damage please before connecting any sound source to this unit control that its volume is totally lowered Technical Specifications Model AF4 Input connector Balanced 6 3mm 1 4 jack Output connector Balanced 6 3mm 1 4 jack Freguency response 20Hz 20KHz gt 1dB Power requirements AC 110 120 220 230V 50 60Hz DC 24V Rack dimension 1U 19 standard Dimensions WxHxD 483x44x210 mm 19in x 1 75in x 8 2 in
6. ndicator Filter bypass master switch Freguency and filter attenuation settings poe Md Rear panel description E IEC standard AC power supply socket Fuse holder 24V DC emergency power supply terminals Balanced 6 3mm 1 4 output jack connector Balanced 6 3mm 1 4 input jack connector MAN UI Installation 1 AC power supply connection To connect this unit to AC power supply please use supplied linecord Input connection The input connector fig 2 ref 5 is a balanced 6 3mm 1 4 jack connector This connector accepts line level sound sources like tuner CD player tape recorder etc Please refer to following picture for wiring BALANCED TIP RING xD SLEEVE Output connection The output connector fig 2 ref 4 is a balanced 6 3mm 1 4 jack connector This connector may be used to connect other units like sound processors or amplifiers Emergency power By using the rear panel terminals fig 2 ref 3 this unit can be connected to 24V DC power supply allowing use during black out DC power supply can be supplied by an external generator or a battery 24V able to supply 0 5 A at least Frequency level LED indicator Using this display fig 1 rif 2 it s possible to check the signal behaviour In this way its easier to control feedback or noises generating frequencies Filters adjustment controls The unit has four filters for each filter there are two knobs and one switch I
7. ration could result in fire or electric shock Damages requiring services Don t attempt to do operations not described in this user s manual e In the following cases please refer to an authorized maintenance center or skilled personnel When the unit works improperly or it doesn t work at all If power cord or plug are damaged If liquid has spilled or objects have fallen into the unit The unit has been exposed to rain The unit doesn t operate normally o it exhibits a marked change in performance If the product has dropped or it has been damaged in any way Maintenance The user shouldn t attempt maintenance operation not described in this user s manual Every maintenance operation should be done by gualified personnel only IMPORTANT SAFETY INSTRUCTIONS Install this unit following owner s manual instructions e Don t install connect or disconnect power supply when the unit is powered otherwise there s an high risk of electric shock e Don t open the unit there are no user serviceable parts inside e If you detect a particular smell from the unit please turn it off immediately and disconnect the AC power cord Don t block the unit ventilation openings e Avoid using this unit in overload for a long period Don t force commands switches controls etc UI To obtain good speakers wire contacts please tighten the screw terminals firmly For safety reason don t defeat the grounding connection
8. t it paying particular attention to cords at plugs convenience receptacles and wall outlet Cleaning e You can clean the unit with a compressed air flow or a wet cloth Don t clean the unit using solvents like trichloroethylene thinners alcohol or other fluids with very strong volatility and flammability Non use periods The unit AC power cord should be unplugged from the outlet if it s unused for a long period Objects or liguid entry inside the unit Be careful that no objects fall or liguid is spilled inside the unit through ventilation openings Safe power line use e Keep firmly the plug and the wall outlet while disconnecting the unit from AC power If you re not going to use the unit for a long period of time please unplug the power cord from AC power outlet To avoid unit power cord damaging please don t strain the AC power cable and don t bundle it e In order to avoid unit power cord damaging please be sure that the power cord is not walked on or pinched by heavy objects Unit relocation Before any unit relocation please control the unit is turned off The power cord must be unplugged by the wall outlet and all the connections wires should be disconnected as well Don t open this unit Don t attempt to open or to repair this unit by yourself For any problem solution not described in this owner s manual please refer to qualified personnel only or consult us or your National Distributor Any improper ope
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